if the log pattern/path referenced doesn't exist, create all necessary parent...

if the log pattern/path referenced doesn't exist, create all necessary parent directories (killing the JVM if it fails, rather than silently gobble the log messages to /dev/null)

core/java/src/net/i2p/util/LogWriter.java

@@ -122,6 +122,18 @@ class LogWriter implements Runnable {
         File f = getNextFile(pattern);
         _currentFile = f;
         _numBytesInCurrentFile = 0;
+        File parent = f.getParentFile();
+        if (!parent.exists()) {
+            boolean ok = parent.mkdirs();
+            if (!ok) {
+                System.err.println("Unable to create the parent directy: " + parent.getAbsolutePath());
+                System.exit(0);
+            }
+        }
+        if (!parent.isDirectory()) {
+            System.err.println("wtf, we cannot put the logs in a subdirectory of a plain file!  we want to stre the log as " + f.getAbsolutePath());
+            System.exit(0);
+        }
         try {
             _currentOut = new FileOutputStream(f);
         } catch (IOException ioe) {